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2025-05-22
04:46
Building Next-to-Next Leading Logarithmic parton showers: the PanScales recipe / Ferrario Ravasio, Silvia (CERN)
Parton showers lie at the core of Shower Monte Carlo event generators, the default theoretical tools used to interpret collider data. [...]
CERN-TH-2025-102 ; arXiv:2505.13395. - 4.
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2025-05-21
04:09
Extended scalar sectors from all angles -- Mostly at lepton colliders / Robens, Tania (Boskovic Inst., Zagreb ; CERN)
I briefly discuss the current state of the art for models with extended scalar sectors and give examples for corresponding investigations, with a focus on processes at lepton colliders..
RBI-ThPhys-2025-20 ; CERN-TH-2025-082 ; arXiv:2504.11969. - 11.
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2025-05-20
04:06
The LHC has ruled out Supersymmetry -- really? / Constantin, L. (LPSC, Grenoble) ; Kraml, S. (LPSC, Grenoble) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris)
Despite early hopes that the Large Hadron Collider (LHC) would quickly unveil supersymmetric particles, none have been detected to date. [...]
CERN-TH-2025-100 ; arXiv:2505.11251. - 8.
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2025-05-20
04:04
Spontaneous Magnetogenesis at the Electroweak Phase Transition / Domcke, Valerie (CERN) ; Ema, Yohei (CERN) ; Patel, Teerthal (Vanderbilt U.)
Spontaneous CP violation during the electroweak phase transition can induce a twisting of the magnetic field configuration of Standard Model dumbbells, resulting in sizable intergalactic magnetic fields and a small baryon asymmetry, in agreement with observations. [...]
CERN-TH-2025-089 ; arXiv:2505.10637. - 26.
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2025-05-18
05:11
QCD splitting functions beyond kinematical limits / Campbell, John M. (Fermilab) ; Höche, Stefan (Fermilab) ; Knobbe, Max (Fermilab) ; Preuss, Christian T. (Gottingen U.) ; Reichelt, Daniel (CERN)
We present a systematic decomposition of QCD splitting functions into scalar dipole radiators and pure splitting remainders up to second order in the strong coupling. [...]
FERMILAB-PUB-25-0276-T ; CERN-TH-2025-091 ; MCNET-25-09 ; arXiv:2505.10408. - 37.
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2025-05-13
04:08
pNGB Higgs Naturalness at a Tipping Point / McCullough, Matthew (CERN) ; Menkara, Adriana (DESY) ; Salvioni, Ennio (Sussex U.)
In scenarios where the Higgs is viewed as a pseudo Nambu-Goldstone boson (pNGB) the question of naturalness finds itself, from a phenomenological perspective, at a tipping point between direct searches and precision. [...]
CERN-TH-2025-067 ; DESY-25-052 ; arXiv:2505.06052. - 21.
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2025-05-07
04:03
The Simplest Dark Matter Model at the Edge of Perturbativity / Escudero, Miguel ; Hambye, Thomas
Increasingly sensitive direct detection dark matter experiments are testing important regions of parameter space for WIMP dark matter and pushing many models to the multi-TeV regime. [...]
CERN-TH-2025-087 ; ULB-TH/25-04 ; arXiv:2505.02408. - 5.
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2025-05-06
04:31
Gravitational Wave Memory of Primordial Black Hole Mergers / Gasparotto, Silvia (Barcelona, IFAE) ; Franciolini, Gabriele (CERN) ; Domcke, Valerie (CERN)
The gravitational wave signal of binary compact objects has two main contributions at frequencies below the characteristic merger frequency: the gravitational wave signal associated with the early inspiral stage of the binary and the non-linear gravitational wave memory. [...]
CERN-TH-2025-051 ; arXiv:2505.01356. - 17.
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2025-05-02
04:23
A Universal Equilibration Condition for Heavy Quarks / Rajagopal, Krishna (MIT) ; Scheihing-Hitschfeld, Bruno (Santa Barbara, KITP) ; Wiedemann, Urs Achim (CERN)
Kinetic equilibration at late times is physically required for heavy particles in a finite temperature medium. [...]
CERN-TH-2025-088 ; MIT-CTP/5858 ; arXiv:2504.21139. - 6.
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2025-04-30
05:07
Starlight from JWST: Implications for star formation and dark matter models / Ellis, John ; Fairbairn, Malcolm ; Urrutia, Juan ; Vaskonen, Ville
We confront the star formation rate in different dark matter (DM) models with UV luminosity data from JWST up to $z\simeq25$ and legacy data from HST. [...]
KCL-PH-TH/2025-12 ; CERN-TH-2025-085 ; AION-REPORT/2025-03 ; arXiv:2504.20043. - 15.
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